Franz Niecknig

The

We calculate the omega --> pi0 gamma* and phi --> pi0 gamma* electromagnetic transition form factors based on dispersion theory, relying solely on a previous dispersive analysis of the corresponding three-pion decays and the pion vector form factor. We compare our findings to recent measurements of the omega --> pi0 mu+ mu- decay spectrum by the NA60 collaboration, and strongly encourage experimental investigation of the Okubo-Zweig-Iizuka-forbidden phi --> pi0 l+ l- decays in order to understand the strong deviations from vector-meson dominance found in these transition form factors.

\omega -> \pi^0 \gamma^*

We analyze the pion transition form factor using dispersion theory. We calculate the singly-virtual form factor in the time-like region based on data for the

\phi -> \pi^0 \gamma^*

e^+e^-\rightarrow 3\pi

Dispersive analysis of the pion transition form factor

e+e-→3π cross section, generalizing previous studies on

Dispersive analysis of omega --> 3pi and phi --> 3pi decays

\omega ,\phi \rightarrow 3\pi

On the role of final-state interactions in Dalitz plot studies

ω,ϕ→3π decays and